code: def test_read_ubyte(self):
      with rasterio.open("tests/data/RGB.byte.tif") as s:
          a = s.read(1)
          self.assertEqual(a.dtype, rasterio.ubyte)
  
imports: from hashlib import md5
  import unittest
  import numpy
  import pytest
  import rasterio
  from rasterio.errors import DatasetIOShapeError
label_desc: Use image node_id 3 for calling the ReaderContextTest obj's underlying member method code with example usage: obj.test_read_ubyte() without return types